Concentric dual engine exhaust system
AssigneeGeneral Motors Corporation
InventorsHarold A. Little, Richard L. Balsley
Life of this patent
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Abstract
A vehicle mounted internal combustion engine has a dual exhaust system including a single manifold having separate plenums connected to receive exhaust from diverse ones of the engine cylinders. The plenums have separate concentrically arranged discharge fittings which connect with a pair of exhaust pipes, mounted one inside the other, to provide two separate exhaust flow paths from the engine cylinders to the ends of the manifold connected exhaust pipes at their juncture with an associated exhaust converter.
Claims6
An exhaust manifold for a multi-cylinder internal combustion engine, said manifold defining two separate exhaust gas chambers, means for connecting said chambers to diverse ones of the engine cylinders to receive exhaust gas therefrom, an enlarged discharge passage extending from one of said chambers and terminating at a pipe fitting adapted to sealingly receive a first tubular exhaust pipe to carry exhaust gas from said one chamber, and a smaller discharge passage extending from the other of said chambers and terminating at a pipe fitting disposed within the enlarged discharge passage and adapted to receive a second tubular exhaust pipe disposed within the first pipe to carry exhaust gas from said other chamber.
An exhaust system for a multi-cylinder internal combustion engine, said system comprising
- a dual exhaust manifold defining two separate exhaust gas chambers, means for connecting said chambers to diverse ones of the engine cylinders to receive exhaust gases therefrom, an enlarged discharge passage extending from one of said chambers and terminating at a pipe fitting, and a smaller discharge passage extending from the other of said chambers and terminating at a pipe fitting disposed within the enlarged discharge passage and
- a pair of tubular exhaust pipes one connected with each of said pipe fittings and defining separate passages for the discharge of exhaust gases from the two manifold chambers, the pipe connected with the fitting of said smaller discharge passage being contained within the other pipe for a substantial portion of its length to provide separated flow of the discharged gases for a predetermined distance from the engine cylinders.
Dependencies are inferred from the claim text.